Well I haven't seen many reviews on this boot, so I thought I would throw something up. I have only had these boots for a very short while. Here are my initial impressions. The second I put them on in the 5.11 store, they felt like a good comfortable pair of Sport shoes, not boots. They are extremely comfortable, and don't any break in. I have been wearing the competitors lightweight sports type duty boots, but have become tired of having to send them back every 4 or 5 months to exchange them due to the boot coming apart. 5.11 has finally entered the market with their version, and so far they are impressive. I can't comment on how well the new synthetic leather is going to hold up, but I will report back after some usage. With most sport shoes not using real leather any longer, I'm not really concerned. So in short, if you are wearing those other boots, but are tired of the same thing I was, but want something super light and comfortable, IMO better fitting than the others, you definitely need to check these out.
I guess I am a traditionalist. I do not like the fact that these boots are not leather. I will be returning. Fortunately, 511 has a 30 day try on with their boots. Other than not liking the fact they are not leather they feel comfortable and are true to size.